Bit rubbing

It's the same bit I've been using for over a year (loose ring eggbutt). However I noticed that in last couple rides it's been rubbing my paint's sides. NOT the corners of the mouth or the lips, but above.

She seems to be more relaxed and foaming, so the whole area is much more wet, and I think that may be an issue.

It's a nice, smooth bit (no rough area or anything). The size is correct (it was first thing I re-checked yesterday just to be sure her head/mouth didn't grow). And as I said same bit/bridle for over a year.

BTW, I did use the bit guards in past couple times (when I used straight loose rings), and they rubbed as well as long as they became wet. Looks like she has very sensitive skin (she's white with pinky skin).

Any suggestions? I'm thinking about using vaseline on next ride to see if it helps any.

Sorry - confused. 'Loose ring eggbutt' is something of a contradiction in terms :)

I am thinking something like this?
Different country, different names for things, different types of bits........

Loose Ring Eggbutt

I would try vaseline - not going to hurt anything
I've noticed that our pink nose horse has suddenly got some sore spots around her mouth this week, her fly mask prevents sunburn really well so I'm thinking plant related though she is on her usual paddock

Lol! What jaydee posted. Mine is a different in metal/mouthpiece, but same in rings configuration: Mikmar Bit Company (to prevent pinching and/or use of bit guards I had bad luck with).